Fastening device or clip



Dec. 6, 1932. a 5, BLACK 1,889,770

FASTENING DEVICE 0R CLIP Filed April 15. 1929 Patented Dec. 6, 1932UNITED STATES PATENT OFFICE GEORGE E. BLACK, 01 SEWICKLEY, PENNSYLVANIA,ASSIGNOR TO K. H. ROBERTSON COMPANY, OF PITTBBUBGH,PENNBYLVANIA, ACORPORATION OF PENNSYLVANIA rasrmmre navrcn on our 2 Application filedApril 18,

This invention relates to a fastening device or clip for attaching metalsheets and partlcularly corrugated metal sheets whlchform the roof andside walls of buildings or l ke structures, to the steel frame orsupporting members of the building to which the metal sheets are usuallyriveted.

The invention has for its object to provide a fastening device or clipwith which the metal sheets may be more firmly securedto and solidlysupported by the purlins or like metal members of the steel framework.

To this end the clip is constructed as will be hereinafter described.

Fig. 1 represents a portion of a metal roofing sheet which is to besecured to a roof purlin by clips embodying this invention;

Fig. 2, a section showing the metal roofing sheet riveted to the purlin;

Fig. 3, a section like Fig. 2 to illustrate the advantage of theimproved clip, and

Fig. 4, a plan of the clip shown 1n Flgs. 1 and 2.

Referring to the drawing 10 represents a corrugated metal sheet, whichis represented as plain metal but which may be of protected metal suchas now largely used in buildings and like structures.

The metal sheet 10 is secured to the metal supporting member 12, shownas a channel bar, by clips embodying this invention.

Each clip consists of a relatively short metal bar 13 bent at its frontend to form a hook 14 for engaging the upper flange 15 of the purlin ormetal supporting member 12.

The metal bar 13 is made of a length greater than the width of the flane 15 so as to roject beyond the vertical we or member 1 of the purlin asrepresented by dotted lines in Fi .2.

The metal bar 13 has extended from its upper surface a rivet blank 18having the lower portion 19 of its shank extended through a hole in thebar 13 and riveted against the lower surface of said bar, and having theupper portion of its shank preferably made tapering and of suflicientlength to project above the metal sheet 10 and form the head 20 of therivet.

The projecting rear end 16 of the bar 13 is 1829. Serial No. 854,942.

designed to be bent down to engage the vertical or web member 17 of thechannel'bar 12, which is accomplished in practice by the workmanhammering the projectingportion 16 of the bar 13 into engagement withthe Vertical member or web 17 of the channel bar before the head 20 onthe rivet is formed.

It is highly desirable that when the head 20 of the rivet is formed, theportion of the bar 13 from which the rivet stud 190 projects, shouldmake extended contact with the upper flange 15 of the purlin or channelbar 12, and that the projecting rear end portion 16 of the bar 13,indicated by dotted lines in Fig. 2, should make close and firm contactfor its entire length with the vertical member or web 17 of the purlin,so that the bar 13 and metal sheet 10 may be immovable on the purlinwhen the head 20 of the rivet is being formed.

To accomplish these results, the bar 13 is provided with a hole oropening 22 through it, which is located with respect to its hooked endso that when the hooked end is engaged with the flange 15 of the purlinand driven home, the said opening will be in close proximity to thecorner formed by the flange 15 and web 17 of the purlin, and preferablywith the center of the opening 22 substantially in the same plane astheouter surface of the web 17, and said opening will be between theside edges of the bar 13 as represented in Fig. 4, so that when theprojecting end 16 of the bar 13 is hammered down by .the workman, itwill bend about the corner of the purlin and be engaged for its entirelength with the web of the purlin without disturbing the relation of thebar 13 with the upper surface of the purlin, as clearly shown in Fig. 2.

By reference to Fig. 2, it will be seen that the oli is in firm contactthroughout its entire fiangth with the purlin and is firmly anchoredthereto by the hook at one end and by the flange 23 at the other end,which flange is formed from the end portion 16 and shaped by the webportion of the purlin.

By locating the opening 22 between the side edges of the bar 13, theflange 23 is capable of being formed and engaged with the web 17 withoutbreaking or rupturing the I tough outer surface or skm of the bar 13 andtherefore without weakening the same.

In Fig. 3 is illustrated a clip of the same 5 stock as the clip shown inFig. 2, but without the opening 22, and the disadvantages of such a clipare illustrated, for by reference to Fig. 3, it will be observed thatthe portion of the clip above the purlin is bowed and does [0 notcontact with the purlin throughout its length as in Fig. 2 andconsequently provides an insecure fastening for the roofing sheet.

Furthermore the depending flange 23 is 5 also bowed and if hammered soas to contact with web 17 of the purlin, the tough outer skin of the barfrom which the clip is formed, is liable to be ru tured and the flange23 broken off by the ammering to obtain contact of the flange 23 for itsentire length.

These objectlons are avoided by providing the bar with an opening 22between its side edges and located at such point in its length as tohave the openin in close proximity to the corner of the purlm andpreferably with the center of the opening in the plane of the outersurface of the web 17 of the purlin as illustrated in Fig. 2.

The head 20 is formed on the rivet by a suitable tool in the hands of aworkman, which tool may be used to force the sheet 10 onto the rivetstud 190 and then u set the latter to form the head 20, and as t e rivetstud 190 is solidly supported or backed up by the purlin, a materiallystronger connection between the metal sheet 10 and the clip may beobtained. A

The opening 22 is shown as circular in form, which may be preferred, butit is not desired to limit the invention in this respect.

What is claimed is:

A clip of the character described, comprising a flat metal bar having aton h outer skin .and bendable with difiiculty, said bar being providedat one end with a hook and between its ends with a rivet blank extendedfrom its surface opposite to said hook and having in it between saidrivet blank and the rear end of saidbar an opening located between thesides of the bar to align with the edge of the support upon which theflat portion of the bar which carries the rivet blank is to rest,whereby the rear portion of the fiat bar bendable with difiiculty andprojectin beyond the edge of said su port may be iammered into aposition su stantially at 'ri ht angles to the fiat portion of the barrestmg on the said support without breaking the tough skin of said barat the bend therein and without disturbing the contact of the fiatportion of the bar with the upper surface of said su port.

n testimony whereof, I have signed my name to this specification.

GEORGE E. BLACK.

